{
  "annotation_id": "7bb62611-26d2-414e-96ff-ed13e24eb7fd",
  "date_created": "2026-03-02T18:01:24.760000Z",
  "date_modified": "2026-03-02T18:01:24.760000Z",
  "file_hash": "885302fba7973567f1312a5ddd8a6754377f4e3ac8b74fbd4d09ce21d14482b7",
  "private": false,
  "record": {
    "abstract": "It is shown that recently measured cross sections for double ionization of\nnegative ions ($H^-, O^-$, and $C^-$) possess a universal shape when plotted in\nsuitable dimensionless units. The shape can be represented with a simple\nanalytical function, following the same principles as it has been done in\nestablishing a universal shape function for single ionization [Rost and Pattard\n1997 Phys. Rev. A {\\bf 55} R5]. Thereby, it is demonstrated that direct double\nionization dominates the cross section for the targets considered.",
    "arxiv_id": "physics/9904032",
    "authors": [
      "Jan M Rost",
      "Thomas Pattard"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1088/0953-4075/32/15/107",
    "journal_ref": "J. Phys. B 32, L547 (1999)",
    "title": "Universal shape function for the double ionization cross section of   negative ions by electron impact",
    "url": "https://arxiv.org/abs/physics/9904032"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ed819976-e2b4-49c4-888d-6b6a1e84c05a",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}